[1]WANG Shaoye,NI Yongxin,PENG Hua,et al.Temporal and Spatial Variation Characteristics and Influencing Factors of Water Yield Coefficient in the Growth Season of Yanhe River Basin in the Past 20 Years[J].Research of Soil and Water Conservation,2023,30(03):423-429.[doi:10.13869/j.cnki.rswc.2023.03.015]
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Temporal and Spatial Variation Characteristics and Influencing Factors of Water Yield Coefficient in the Growth Season of Yanhe River Basin in the Past 20 Years
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 03
Page number:
423-429
Column:
Public date:
2023-04-10
- Title:
- Temporal and Spatial Variation Characteristics and Influencing Factors of Water Yield Coefficient in the Growth Season of Yanhe River Basin in the Past 20 Years
- Keywords:
- water yield coefficients; spatial and temporal variation; spatial cluster analysis; Yanhe River Basin
- CLC:
- P339
- DOI:
- 10.13869/j.cnki.rswc.2023.03.015
- Abstract:
- [Objective]The change of water yield coefficient in the basin reflects the comprehensive influence of rainfall and underlying surface change. It is of great significance to study the change characteristics of water yield coefficient for reasonable regulation of water resources in the basin. [Methods] Yanhe River Basin was taken as the study area, the change trend of water production coefficient in the growth season was analyzed by using the unitary linear regression and Mann Kendall method. The spatial clustering analysis was carried out in combination with the four factors affecting the water production coefficient, namely NDVI, rainfall, rainstorm days and rainless days, and the spatiotemporal change characteristics were explored. [Results] From 2001 to 2017, the water yield coefficient in the growth season of the Yanhe River Basin showed a fluctuating increasing trend, but the increasing trend was not significant, and the change range in most regions was relatively small, with a tendency rate between 10.017/decade and 0.031/decade. The average water yield coefficient in the growth season of the Yanhe River Basin increased gradually from north to south and from west to east in space, and there was an insignificant upward trend in most regions. The water yield coefficient in the northwest region showed an insignificant downward trend, the water yield coefficient in the central part of the region showed a significant upward trend. [Conclusion] As far as the change rate is concerned, the water yield coefficient is positively correlated with rainfall and rainstorm days, and negatively correlated with rainless days and NDVI. As far as the multi-year average value is concerned, the average water yield coefficient has a positive correlation with the average rainfall, rainstorm days and NDVI, and a negative correlation with the number of rainless days. The analysis of temporal and spatial variation characteristics and influencing factors of water yield coefficient in Yanhe River Basin can provide theoretical support for water resources management and planning in arid and semi-arid regions.
- References:
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Last Update:
2023-04-10